Lamp shade



July I, 1958 H. HERREY LAMP SHADE Filed Ja INVENTOR. HERM/I mv HERRE Y ATTORNE Y United States a Patent LAMP SHADE Hermann Herrey, New York, N. Y.

Application January 18, 1954, Serial No. 404,429

1 Claim. (or. 240-108) This invention is a continuation in part of Serial No. 722,883, filed January 18, 1947 and since abandoned, and relates generally to statically rigid structures and more particularly to structural elements or hollow bodies which are capable of supporting themselves or of supporting loads carried either inside or resting or suspended on the outside or outer surface of said elements or bodies.

It is one of the main objects of this invention to provide means affording a simplified and more economical construction having greater strength and rigidity than conventional structures using substantially the same quantity and weight of material.

One of the objects of the invention is a self-supporting structure consisting substantially of two curved sheets or planar structures of substantially elastic material extending in space to supplement each other, forming a hollow body having linear geneatrices intersecting each other along a substantially closed special curve.

In a specific embodiment of the invention the two sheets are attached to each other along that curved line so as to prevent expansion under control of their natural or inherent elasticity, such attachment being achieved substantially by frictional or interlocking only or alternatively by friction and bonding.

It is still another object of this invention to provide means not requiring, though not excluding, for the assembly of said structures of aforesaid type any special extraneous connecting devices, such as nails, screws, rivets, or any binding means, such as welding, glueing, etc.; said structures, elements or bodies holding together through mere interlocking of the parts of which said structures etc. consist.

It is still another object of this invention to provide means for constructing curved structural elements or hollow bodies for a great variety of shapes and purposes, by assembling die cut flat pieces without the need of any molds, casts, presses or other special forming machinery to obtain the desired particular shape of said elements, bodies, etc.

Still another object of this invention is to provide means ensuring the assembly of a great number and variety of structural elements and hollow bodies from a limited number of simple die cut flat sheets, so that the number of required standard patterns of sheets can be reduced to a fraction of the number of shapes and kinds of objects to which these sheets can be assembled.

Furthermore, it is an object of this invention to provide structural bodies, in which the inherent springiness of most of the employable sheet materials such as steel, brass, aluminum, plastics, plywood, cardboard, paper, etc. can be utilized to yield additional strength and rigidity of such bodies and to allow a corresponding reduction or decrease of the thickness and weight of the material used.

It is still a further object of this invention to provide structural elements, containers and like hollow bodies for a great variety of purposes, which can be stored and shipped in the most economical manner either flat, rolled, folded or otherwise requiring a minimum of space, before their assembly.

With these objects in view, the invention consists of certain features of novelty in the construction, combination and arrangement of parts by which the aforesaid and several other objects, hereinafter set forth, are achieved, all as fully described with reference to the accompanying drawings.

In the drawings:

Fig. 1 shows perspectively with parts broken away a realisation of the embodiment of the invention in the form of a lamp screen with Fig. 2 showing one of the sheets forming the lamp screen prior to assembly, and

Fig. 3 shows the screen stmcture assembled together with a table lamp.

According to Fig. 1 a lamp screen consists of two supplementary sheets 61, 62 of highly elastic plastic material and of substantially cylindrical configuration. Intersection occurs at an angle of about Each of these sheets is cut from a flat blank schematically indicated in Fig. 2 having punched out teeth, indicated at 63 along its edges. The two sheets 61, 62 are assembled together by simply interlocking the teeth of one sheet with corresponding openings of the other sheet.

The teeth may be of any desired shape but preferably slightly expanding towards their outer edges so as to assure against unlocking.

If necessary locking may be additionally assured by attaching the two sheets to each other for example by means of perforations shown at 64 and a string 65 passed through these perforations as schematically indicated in Fig. 3 by dotted lines.

However, in accordance with this invention, mere frictional interlocking has been found to be satisfactory and sufficient.

Sheets 61 and 62 are substantially identical in shape except that sheet 61 is provided with a relatively large center hole 66 and sheet 62 is provided with a number of relatively small center holes 67 symmetrically arranged as shown in Fig. 1 and schematically in Fig. 2.

Center holes 66 and 67 serve to mount the assembled lamp screen 61, 62 on a more or less standard table lamp indicated in Fig. 3 wherein structure 61, 62 is shown to be mounted on the innermost of center holes 67 between two nuts 68, 69 screwed over the screw portion 70 of a more or less standard fixture 71 which is supported on a lamp stand 72 passing through large center hole 66 of section 61 of screen assembly 61, 62.

In order to reduce excessive heat transfer, there is provided an asbestos washer schematically indicated at 73 between nut 69 and the inside of screen section 62. Center holes 67 serve to conduct the heat produced by bulb 73 from the inside of screen structure 61, 62 to the outer atmosphere. Naturally without exceeding the scope of the invention the frictional interlocking shown in Figs. 2 and 3 can be replaced by any other type of frictional attachment.

I claim:

A lamp structure comprising two sheets in contact along at least a portion of their edges and so fixed in position with respect to each other that they face each other with trough-like surfaces in at least one location, said sheets constituting in said location at least in substantial parts the walls of a hollow body of figure eightshaped elements intersecting at an angle and along a single substantially closed dimensional line of intersection, said sheets frictionally engaging each other at least at least-one ofsaid sheets being --elastically deformed so as to be pressed into frictional engagement against the other of saidsheets, said sheets being of substantially identical cylindrical configuration and provided along theiredge's vvith teeth interlocking each other so as to be held 'together against their inherent springiness, one ,of said sheets having a relatively large center hole and the other of said sheets having a number of relatively small ieenter'holes, and a lamp structure supporting the sheet assembly on one of said smaller openings and extending vthrough said assembly and said larger opening to the outside;

References Cited in the file of this patent 'UNITED STATES PATENTS Hirtzler June 4, Koenig Apr. 14, Beer Ian. 22, Bass Jan. 11, McGuire Dec. 9, Scheprnoes Feb. 2, Raisz Aug. 20,

FOREIGN PATENTS Great Britain Sept. 13, France Mar. 4, 

